<!doctype html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport"
          content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <script src="https://cdn.jsdelivr.net/npm/vue@2.6.10/dist/vue.js"></script>
    <title>Document</title>

</head>
<body>
    <div id="app">
        <button @click="handler">修改数组数据</button>
        <ul>
            <li v-for="item in person" :key="item">{{item}}</li>
        </ul>

    </div>
    <script>

        Vue.config.productionTip = false

        const vm = new Vue({
            el:'#app',
            data(){
                return{
                    person: ["小王", "大李", "小张", "王中王"],
                }
            },
            methods:{
                handler(){
                    // this.person[0] = 'lucy';
                    // this.person.length = 1;
                    // this.person.push('lily');
                    // this.person = this.person.filter((item)=>{
                    //     return item.startWith('小')
                    // })
                    this.person = this.person.map((item)=>{
                        return item + '1'
                    })
                }
            }
        })
    </script>
</body>
</html>